Synoptic scale of Chemical Equivalents
1 Synoptic scale of "Chemical Equivalents", marked "Published by W.Cary, 182 Strand, Jan 1 1814". The scales are of paper pasted on mahogany in the form of a slide rule, 12" x 2 5/8" x 3/8"
- James Watt's Garret Workshop
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- associated concepts
- Major J.M. Gibson-Watt
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